package leetcode.网易笔试.b;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String next = sc.next();

        int n = sc.nextInt();

    }

    class TreeNode{
        int val;
        TreeNode left;
        TreeNode right;
    }



}
